Major Cleanup -- Gru_struc is now becoming the new GRU container.

build/build_scripts/build_v4_local.sh

build/includes/global/gru_struc.hpp

build/includes/global/message_atoms.hpp

build/includes/global/num_gru_info.hpp

build/includes/hru_actor/hru_actor.hpp

build/includes/hru_actor/hru_utils.hpp

build/includes/job_actor/GRU.hpp

build/includes/job_actor/gru_struc.hpp

build/includes/job_actor/job_actor.hpp

build/includes/job_actor/node_actor.hpp

build/source/file_access_actor/summa_init_struc.f90

build/source/global/gru_struc.cpp

build/source/global/gru_struc.f90

build/source/global/message_atoms.cpp

build/source/hru_actor/hru_actor.cpp

build/source/hru_actor/hru_utils.cpp

build/source/job_actor/GRU.cpp

build/source/job_actor/async_mode.cpp

build/source/job_actor/data_assimilation_mode.cpp

build/source/job_actor/distributed_job_actor.cpp